Created UI to contact mailing list. Added Modal support and stand-alone page to routing
Merge branch 'Prototype' of https://github.com/my-koop/service.website into ad_mailing_list_send
Added documentation on props and made sorting optional on table sorter
Made filtering optional for table sorter
Can now choose how to generate a cell for each column
Refactor ListModButtons to support any kind of icons
CRUD Interface to manage volunteer availabilities
Removed isFiltered bool from FilterableItemList component, replaced by checking if filterOptions array is initialized
Clearfix for MailingListSendBox.
Allow to use text instead of a glyph for the button
Created helper class to create modals. Converted UserPrivilegesModal to use this helper
Merge branch 'Prototype' of https://github.com/my-koop/service.website into mike_refactor_table_sort

Conflicts:
	Koop/components/TableSorter.jsx
Merge branch 'Prototype' of https://github.com/my-koop/service.website into mike_refactor_table_sort
Refactored LoginBoxModal to use Abstract Modal
Adjusted parameter name after rename
Allows nesting of overlay triggers with CustomOverlayTrigger component.
Allow to set tooltip props
Fix code convention
PR#126
Merge pull request #124 from my-koop/ad_fix_filterabletable

Removed isFiltered bool from FilterableItemList component,
Tweaked tabs, added missing ;